I use this app, and it seems about right. I also use Atomic Clock & Watch Accuracy Tool. It has a clock you can use to set your tone exactly, and then you can track timing of a watch over days or weeks or however long you want and find out it's real-world accuracy. So I use the timegrapher app to adjust, and the tracking tool to verify the adjustment.
I do use it. Pretty good for spd. Reflects the real time running of my Pelagos and Laco.
It saved me buying a Mark XX that was running plus 20 spd and meant I bought one running minus 2 to 3 spd on wrist and plus 1 spd in the box. Because I tested them both in the IWC boutique. So I'm very grateful for this app!
Amante de los relojes y del increible universo que los rodea desde mi adolescencia. Coleccionista, restaurador amateur y admirador de estas máquinas increíbles.
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It's the only one I've tried. Seems to work quite well considering it's a free app.
Yes I use it and it works well for me.
I tried several apps a few months ago and found this one easiest to use and most useful.
No i have a Chrono-comparator I once downloaded an app to my iPhone and it didn't work
I use this app, and it seems about right. I also use Atomic Clock & Watch Accuracy Tool. It has a clock you can use to set your tone exactly, and then you can track timing of a watch over days or weeks or however long you want and find out it's real-world accuracy. So I use the timegrapher app to adjust, and the tracking tool to verify the adjustment.
I use it and find it to be pretty good. It allows you to check the accuracy in 6 positions, though I only do 4.
I use the app. I would consider it good for SPD readings, but less so for amplitude and beat error.
I do use it. Pretty good for spd. Reflects the real time running of my Pelagos and Laco.
It saved me buying a Mark XX that was running plus 20 spd and meant I bought one running minus 2 to 3 spd on wrist and plus 1 spd in the box. Because I tested them both in the IWC boutique. So I'm very grateful for this app!